| Jacqueline Kennedy | (20 October 1968 - 15 March 1975) (his death) |
| Athina Livanos | (28 December 1946 - June 1960) (divorced) 2 children |
Left his $800 million fortune to his daughter Christina. When Christina died, she left the Onassis fortune to her daughter Athina, who inherited half of it in 2003 when she turned 18.
After her divorce from Onassis, Athina married her sister's widower - and Onassis's arch shipping rival - Stavros Niarchos. She was the daughter of another Greek shipping magnate, Stavros Livanos.
Children: Alexander Socrates (30 April 1948 - 23 January 1973) and Christina Onassis (11 December 1950 - 19 November 1988).
Ended his affair with opera diva Maria Callas to marry Jacqueline Kennedy.
Founder (1956) of Olympic Airways of Greece.
In 1954, the FBI investigated Onassis for Fraud Against the Government. He was charged with violating the citizenship provision of the shipping laws which requires that all ships displaying the American flag be owned by United States citizens. Onassis pled guilty and paid $7 million to the United States Government.
According to "Greek Fire: The Story Of Maria Callas and Aristotle Onassis" by Nicholas Gage, Callas's and Onassis's child, a boy, was born and died on 30 March 1960.
Is portrayed by Frank Vincent in Isn't She Great (2000)
"To succeed in business it is necessary to make others see things as you see them."
"If women didn't exist, all the money in the world would have no meaning."
"The secret of business is to know something nobody else knows."
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